How remotely update Windows Update

Dear All,

I regulary administer many Windows XP Professionnal PCs and i apply
security patches to those by using a software like SMS. I have already done
the whole security patches but when i launch Windows Update to those one,
Windows XP tell me that i have to update the Windows update. Could you tell
me where i can find the latest version of Windows update to download ?
I precise that I have already remotely updated all known patches but after
that, Windows XP tell me (when i launch Windows Update through the Internet
Browser) that patch KB892130 will be applied. But when I look at it, it
doesn't concern Windows Genuine Advantage Validation, nor normal Windows XP
Professionnal. Is there a mistake ?
Thanks for your help.
Job